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Index: sys/dev/pci/pci.c
===================================================================
--- sys/dev/pci/pci.c
+++ sys/dev/pci/pci.c
@@ -2900,6 +2900,14 @@
{
struct pci_devinfo *dinfo;
int ln2range;
+ pci_addr_t map;
+ uint16_t cmd;
+
+ /* Clear the MEMEN or PORTEN bit */
+ map = pm->pm_value;
+ cmd = pci_read_config(dev, PCIR_COMMAND, 2);
+ pci_write_config(dev, PCIR_COMMAND,
+ cmd & ~(PCI_BAR_MEM(map) ? PCIM_CMD_MEMEN : PCIM_CMD_PORTEN), 2);
/* The device ROM BAR is always a 32-bit memory BAR. */
dinfo = device_get_ivars(dev);
@@ -2914,6 +2922,9 @@
if (ln2range == 64)
pm->pm_value |= (pci_addr_t)pci_read_config(dev,
pm->pm_reg + 4, 4) << 32;
+
+ /* Restore the original value of PCIR_COMMAND */
+ pci_write_config(dev, PCIR_COMMAND, cmd, 2);
}
struct pci_map *

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